Useful for expressing moods, emotions and nuances in messages, emojis could have another use: as your next smartphone password.

An artist’s depiction of the ‘shibboleth incident.’
Detail from art by H. de Blois, from The Bible and Its Story Taught by One Thousand Picture Lessons, vol. 3, edited by Charles F. Horne and Julius A. Bewer, 1908May 3, 2017